/*
    Carracci Systems - Carracci Server (openbam project)
    Copyright (C) 2007  Carracci Systems

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

package org.openbam.core.expr;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.openbam.core.Event;

/**
 * @author inder
 */
public class Frequency extends AggregateExpression {
    protected Log log = LogFactory.getLog(this.getClass());


    public Frequency() {
        super.setName("Frequency");
    }

    public Object evaluate(Event event) {
        if (log.isTraceEnabled()) {
			log.trace(new StringBuilder().append(getName())
						.append("(").append(nestedExpression.toString()).append(") = ")
						.append(2));
		}
        return new Integer(2);
    }

    public Object getValue() {
        return new Integer(2);
    }

    public IExpression newInstance() {
        Frequency f = new Frequency();
        f.nestedExpression = this.nestedExpression.newInstance();
        return f;
    }
}
